Sanyo MCD-Z8F Service Manual page 8

REPLACEMENT OF CD MECHANISM
6.
Resetting the pickup to the home position
(l) The limit switch is switched ON by the projection of this
rack gear secured to the returned pickup,
after which the
sled motor continues to operate (by the circuit ) for ap-
proximately 30 msec. : there is then again a
reverse opera-
tion, and movement
to the position at which the switch is
switched OFF.
(2)
Rotation continues
for about 30 msec. after the switch is
switched
OFF,
and then the pickup stop at home position.
-!
(LIMIT SWITCH)
CONFIRM
OF CD SECTfON
1. Preparation
Measuring instruments and Test
disc.
(l)TEST DISC : YEDS 18 (.SoNY)
(2) OSCILLOSCOPE : SS5711 (10 MHz and Dual Phenomenon)
NOTE : CD section
of this unit can not need adjustment, be-
1
cause CD P. W. Board checked at automatic check-
er.
2.
Confirm of general operation
(1) Set the test disc.
(2) Press the PLAY button, then confirm
the disc rotating to
clockwise direction.
(3) Press the FFWD or REW button, then confirm the most in-
ner music
or most outer music
(4)
Press the
STOP button.
3. Confirm of eye pattern
accessing at speedy.
I
MAIN P.W. Board (Solder Side)
i
...-
PIN58
"4
PIN 41
0
1C101
<z>
(l) Connect
an oscilloscope to pin
41 (RF) of IC101 and J141 O
(VR),
(2) Set the test disc,
press the PLAY button.
(3) Check to be sure that the "eye" pattern is at center of
waveform and that the diamond shape is clearly defined.
(4) Press the STOP button.
ICI OI,PIN41
+
o
OSCILLOSCOPE
VR(J1410)
o
-7-